Table of Contents
Textures and Microstructures
Volume 35, Issue 1, Pages 23-38
http://dx.doi.org/10.1155/TSM.35.23

Effect of Zonal Isolation on the Kinetics of Sintering a Particulate Body

Urals State Technical University-UPI, 19 Mira Street, Ekaterinburg 620002, Russia

Received 13 November 2000; Accepted 13 January 2001

Copyright © 2001 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper describes the so-called meso-scale simulations of sintering a particulate body. Computations were made using 3D structure-imitation computer model of evolution of a powder compact during sintering. It was demonstrated, that in powder bodies the effect of zonal isolation (forming separate groups of particles during sintering) determines features of shrinkage and internal structure of a compact. In case of the diffusion- viscous flow of particles the fact was proved that the zonal isolation is predetermined by ratio of viscosity and free surface energy. It was verified, that there is a critical value of the above ratio with respect to which the balance of internal structure- creating processes is determined.